While Wicca claims an ancient origin, it contains nothing that was not easily available to Gardner from the writings of others. It's about as authentic as Cecil Sharp's Morris Dancers -- that is to say it is a mostly speculative re-creation of something that cannot be documented. (Actually there was far more contemporaneous documentation for Sharp's work than anything Gardner or Crowley or their ilk came up with.)
It's a free country, and folks can believe what ever they want to. But don't kid yourself about Wicca's supposed ancient origins.
Thank you for the lesson :) (no sarcasm meant).
Recreation of something can never be complete, but it is the gist of the matter that is important.
The truly wise make little of their own wisdom for the more they know, the more they realize how little they know. <---this one is from Tao :D